First of all, you must make full preparations before the interview. Make a perfect resume, pay attention to your proper dress, and have countermeasures to the questions asked by the interviewer. As long as you have enough confidence, you won't feel too nervous.
Secondly, when waiting for an interview, don't ask the interviewer who has already interviewed, otherwise it will cause more anxiety. Adjust your mentality, do your own thing, adjust your breath, and don't think about the interview results in your heart. This is not entirely up to you. Just put your mind right and do your best. Don't take the results too seriously, look at things optimistically, otherwise it will make you more anxious.
Be sure to relax, try to distract yourself and think about other things, such as eating something delicious or thinking about something happy with friends after the interview, to distract yourself and effectively relieve the tension.
In the process of interview, you must answer questions gracefully and the speed of answering should be controlled. Let the interviewer listen to what you say clearly, and don't get confused because of nervousness. This will be especially hopeless, and it will make people feel that they can't do anything important, and they will definitely be denied by the interviewer.
In short, no matter what the result is, just try your best. After all, there is not only one company, there are other options. If you fail, don't be too negative, adjust your emotions as soon as possible and find out the reason for rejection. If it is really your own reason, then correct it and improve yourself better, because there are other options to better prepare for the next job interview.